One of my favourite things of desiging cards is testing the limits of what cards can do and coming up with whacky solutions to different problems
A booster box has 30 packs of 12 cards each, for a total of 360 cards (you of course will end up with some duplicates and lots of cards you still dont have, since cards have various rarities)
7 Plan Your Setup Strategy Draw All The Cards You know who your main attacker is, so now you need to get them out on the field as quickly as possible
The recognizable traits of every Sultai Delve deck will be making use of the graveyard, removal spells, card advantage, and good ways to block non-flying creatures (stall the board)
I think that's worth a bit more than the extra mana Kopala makes opponents pay
The Mycotyrant Ones first impulse when building The Mycotyrant is to reach for saproling and fungus synergies, but that may be a trap